Motorcycle frame



FIG. 1 is a perspective view of a motorcycle frame in accordance with the present invention;

FIG. 2 is a first side elevational view of the motorcycle frame;

FIG. 3 is a second side elevational view of the motorcycle frame;

FIG. 4 is a top plan view of the motorcycle frame;

FIG. 5 is a bottom plan view of the motorcycle frame;

FIG. 6 is a rear elevational view of the motorcycle frame; and,

FIG. 7 is a front elevational view of the motorcycle frame. 

The ornamental design for a motorcycle frame, as shown and described. 